Don't use hard-coded path.
Don't delete non-existent files.
Use unittest.
Test always fails - mark it as such.
Mark slow test as such.
Mark slow test as such.
Fix indentation.
Make paths relative to the topology file.
If scipy isn't available, don't try to import modules that use it.
Don't import scipy unless we need it.
Ensure RMF file is closed before we try to delete it.
Remove unused (and Unix-only) import.